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Studies on abnormal buffalo bulls with reference to scrotal circumference, semen characteristics, seminal plasma hormones and their association with testicular and epididymal histopathology.

Muhammad Tariq Javed ; Department of Veterinary Pathology, University of Agriculture, Faisalabad, Pakistan
Ahran Khan ; Department of Veterinary Pathology, University of Agriculture, Faisalabad, Pakistan
Niaz Ali Naz ; Livestock Production Research Institute, Bahadar Nagar, Okara, Pakistan

Sažetak

This study was carried out on six buffalo bulls (Bubalus bubalis) for a one-year period. Four bulls selected had good and two bulls (No. 321 and 323) had poor semen quality. All bulls were aged from 6-10 years. Scrotal circumference (SC) and sperm characteristics of both bulls were lower than healthy bulls, while dead sperm percentage and total sperm abnormalities were high. Overall seminal plasma testosterone was lower in these bulls, while oestrogen was lower in bull 323 and higher in 321. Histopathological studies of testes of bull 323 showed a 100% loss of germinal epithelium (DGEL) in all three regions of the right testis; however, it was 89.96% in left testis. DGEL in bull 321 was 35.88 % in right and 31.70% in left testis, with higher DGEL in the ventral part in both testes. Total and lumen diameter was greater (P<0.01) in the caudal region of the left epididymis. Epithelial height in the caput region of the left epididymis was higher (P<0.05) in bull 323 while in the corpus of the right epididymis in bull 321 DGEL correlated negatively (P<0.001) with sperm concentration (r = -0.98), progressive motility (r = -0.88) and oestrogen (r = -0.87), and correlated positively (P<0.001) with dead sperm percentage (r = 0.89), total sperm abnormalities (r = 0.99) and testosterone (r = 0.98). Epithelial height showed a negative correlation (P<0.001) with DGEL (r = -0.88) and seminal plasma testosterone (r = -0.87), while it was positive (P<0.001) with oestrogen (r = 0.89).

Ključne riječi

sperm abnormalities; epididymis; testis; histopathology; testosterone; oestrogen; buffalo bull

Hrčak ID:

87906

URI

https://hrcak.srce.hr/87906

Datum izdavanja:

21.8.2001.

Podaci na drugim jezicima: hrvatski

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